Sound insulation.



C. R. SI'BD MAN.

SQUND INSULATION.

APPLIGATION IILBD JUNE 10.71912.

Patented Oct. 21, 1913.

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. .spessa@message naaste@ Galatina Application led .Tune 10, 1912.ASerial No.

To all whom t mag,I concern:

. e it known that I, CHARLES R. STEDMAN, a citizen of the United States,and a resident of Cleveland, in the county of Cuyahoga and State ofOhio, have invented certain Improvements in Sound Insulation, of whichthe following-is a complete and full specification.

The purpose of my improvements is to atford simple and eflicient meansof insulation by the use of sheets or quilts of sound absorbent materialas at present employed, but without injury to their sound deadeningqualities by nailing through the sheets in orer to bond thehtnish floortothe underlying structure.

Referring to the drawing Figure 1 .shows a sectional View of ordinaryfloor construction in which my insulating system is cmployed, thesurface lines being projected perspectively to better illustrate itsapplication. Fig. 2 shows an enlarged scale section of parts included inFig. l. Y

The'joists C and sub-floor B are the most common form of floorconstruction to which my method is applicable. Any,other suitable understructure may be used or the subfloor omitted. These members arehereafter referred to as the supporting structure.7 Over this structureis laid insulating material A, usually' in the form of sheets or quilts,and my invention pertains to the method of securing these sheets and thebearing strips D firmly in position without reducing the elliciency ofthe insulation by driving nails through it.

It will be noticed that the strips D are narrower at the top, one orboth edges being beveled, as at O. The bond strips E are adapted to fitthese edges, and the bearing strip D is thus dovetailed between the bondstrips on either side. A strip of the insulating material A is placedbetween the parallel edges of the bond strip E and the bearing strips Dwhich are then pressed closely together and the bond strips nailed downsecurely to the supporting structure. nails M penetrate the main body ofthe insulation, but since the strips E through which they are driven arethinner than the bearing strips D to which the finish Hoor G is securedby nails L it follows that no nish floor G and except through y Bymethods herestrips are nailed the supporting structure sound-absorbentiaterial. tofore in use the bearmg These I directly through theinsulation into the supporting structure, in which case the nails afforddirect transmission of vibrations between the finish Hoor and thesupporting structure. Or, if laid without nailing, as is often the case,the loorin being tightly driven together tends to bue le, with theresult that the finish floor and the strips to which it is nailed areoften lifted entirely from the sub floor in parts of the room.

Continuing the improvement, I place a strip of insulating material Aunder the base plateJ of all partitions. The weight of the studding'Inailed to this plate holds it down firmly,and it is prevented fromlateral shifting by cleats K nailed to the supporting structure, astripof insulating material also being interposed `between these cleats andthe plate J, and between the cleats-and any adjacent bearing strips DFig. 2.

, Vibrations due to a blow on the partition are absorbed by theinsulation instead of being, as heretofore, transmitted to apartmentsbelow.

In practice if the bond strips to a length equal to the distance betbearing strips they afford a convenient means of spacing the bearingstrips, and if laid in courses distant from each other equal to thewidth 0f the sheets of insulating material it, affords a 1 fans ofsecurely bind ing the edges of the l"\eets.

Having described iy improvements I claim as follows l. A system of-soundinsulation consist ing of a quilt or layer of insulating materialiresting upon the supporting structure, bearing strips resting upon saidquilt, said bearing strips being narrowest at the top, and bond stripsadapted to lit the Vedges of said bearing strips and nailed to thesupporting structure, a. strip of insulating material being placedbetween saidedges and said bond strips, and said bond strips beingthinner than said bearing strips.

2. A system of so'rnd insulation consisting of a quilt or layer ofinsulating materiai rest-ing upon the supporting structure, bearingstrips resting upon said quilt, said bearing strips being narrowest atthe top, and bond strips adapted to tit the edges of said bearing stripsand nailed to the supporting structure, a strip of insulating materialbeing placed between said edges and said bond strips, and said bondstrips being thinner ,than said bearings strips, a layer of saidinsulating material bein ,placed under the base of partitions, sai basePlate being held in place by cleats nailed to the supporting structure`and se 'arated'l from immediate Contact withy sai Vbasev plate and anyadjacent bea-ring stri Aby insulating mateve ges O, bond strips rialsubstantially as escribed.

. '3. The combination with a supporting 4'structure of a quilt -ox layerof insulating material A, bean strips D having-bevele adapted to securesaid bearing strips in a dovetailinginanner,

said bond strips and bearing stripfsr 'being y CHARLES R. STEDMAN.

Witnesses:

FRED C. EMDT, B. C. PARRE'rr.

